Railless PV Array Mounting

摘要

PV array mounting methods have steadily evolved. In the early days, the only option was to attach pre-drilled module rails to the mount holes on the back of PV module frames with nuts and bolts. While this method works when you can access the back of the array, it is not practical with an array that is flush-mounted to a roof. Thus, "top-down mount" methods, which hold modules in place with clips, became the standard. Tightened down from the front, these clips hold the module frames against the rails. However, both of these mounting methods require long rails of anodized aluminum. To reduce system cost, an increasing number of PV mount manufacturers now offer "railless" mounting systems.